scholarly journals A Simple Brushless Motor and Propeller Test Stand for Experiment from Home

2021 ◽  
Vol 2111 (1) ◽  
pp. 012005
Author(s):  
Erwan Eko Prasetiyo
Keyword(s):  
Error Rate ◽  
Test Stand ◽  
Test Results ◽  
Testing Instrument ◽  
Brushless Motors ◽  
Brushless Motor ◽  
Laboratory Facilities ◽  
Current Voltage ◽  
Computer Device ◽  
Force Data

Abstract A brushless motor and propeller test stand is used to test brushless motors and propellers. This testing instrument is still only available in research laboratories. Students and researchers are unable to use laboratory facilities because of the Covid-19 epidemic, thus students must be able to do tests independently from home. Purchasing this testing instrument would be too expensive for students. It is essential to construct a brushless motor and propeller testing instrument at home using simple components that are easy to get on the marketplace. The design concept reads force data using a loadcell sensor and an HX711 driver, and current and voltage data with an INA 219 sensor. The brushless motor’s rotational speed is controlled by a potentiometer. Force, current, voltage, and power are all examples of test results data. A 16×2 LCD is used to show data immediately. Data is also transmitted via a USB connection to a computer device for storage or additional analysis. This study proposes a simple brushless motor and propeller test stand that can measure forces from 0 gf to 1000 gf with an error rate of 0.72 %. The power that can be read ranges from 0 mW to 18960 mW, with a 0.59 % error rate.

scholarly journals Estimasi Gaya Dorong Dari Motor Brushless Dengan Variasi Propeller Untuk Pesawat Model X-UAV Mini Talon Dengan Menggunakan Pengukur Massa

2020 ◽  
Vol 5 (2) ◽  
Author(s):  
Ananda Rafi Rijalul Awwal
Keyword(s):  
Test Stand ◽  
Optimal Configuration ◽  
Brushless Motors ◽  
Brushless Motor ◽  
Aircraft Performance ◽  
The Difference

One that affects aircraft performance is the thrust. The thrust is determined according to the requirements of the aircraft itself. This study uses a thrust test stand that uses a mass gauge as a thrust gauge, using two brushless motors and five propellers to determine the optimal thrust for X-UAV Mini Talon aircraft flying missions. The thrust required by the X-UAV Mini Talon aircraft - is known to be 0.6755 N for cruise flights and 4.979 N for take-off aircraft. After testing, the smallest thrust is produced by the configuration of the DYS 2826-13 brushless motor with a 5x3 inch propeller, while the biggest thrust by the RacerStar BR2212 brushless motor with a 10x6 inch propeller. Compared to calculations with propeller static thrust equation, the difference in thrust in testing with propeller static thrust ranges from 15% to 25%. Therefore, the optimal configuration for flying cruising is the DYS 2826-13 brushless motor with a 5x3 inch propeller, which produces a thrust of 0.988 N. Then, for the optimal configuration take-off is the Brushless DYS 2826-13 with a 9x5 inch propeller, which results in a thrust of 6,151. The configuration above was chosen because it is more efficient, with smaller current requirements compared to other configurations with more or less equivalent thrust.

scholarly journals Multicenter Evaluation of Ceftazidime-Avibactam Susceptibility Testing of Enterobacterales and Pseudomonas aeruginosa on the VITEK® 2 System

2020 ◽  
Author(s):  
Romney Humphries ◽  
Shelley Campeau ◽  
Thomas E. Davis ◽  
Kristin J. Nagaro ◽  
Vincent J. LaBombardi ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Error Rate ◽  
Susceptibility Testing ◽  
Reference Method ◽  
Error Rates ◽  
Performance Criteria ◽  
Test Results ◽  
Major Error ◽  
Overall Performance ◽  
Vitek 2

In this multisite study, VITEK® 2 AST-Gram-Negative Ceftazidime-Avibactam (CZA) test results for 1073 isolates (866 Enterobacterales and 207 Pseudomonas aeruginosa) were compared to the Clinical & Laboratory Standards Institute (CLSI) broth microdilution (BMD) reference method. The results were analyzed for essential agreement (EA), category agreement (CA), major error rates, and very major error rates following FDA/ISO performance criteria using the FDA-recognized CLSI/EUCAST breakpoints (S ≤8/4 μg/ml and R ≥16/4 μg/ml). The overall EA was 94.5% (1014/1073) and CA was 98.7% (1059/1073). No very major errors were reported. The major error rate was 1.4% (14/998). Out of 14 major errors, 9 were within EA. Based on the EA and lack of an intermediate category for CZA, the adjusted major error rate for FDA criteria was 0.5% (5/998). The performance for ISO criteria after error resolutions included EA 94.5% (1014/1073), CA 98.9% (1061/1073), major error 1.2% (12/998), and no very major error. Vitek 2 met the ISO and FDA criteria of ≥95% reproducibility and ≥95% quality control (QC) results within acceptable ranges for QC organisms. Vitek 2 overall performance for Enterobacterales and P. aeruginosa met or exceeded the FDA and ISO performance criteria and thus is a reliable alternative to BMD reference method for routine CZA susceptibility testing.

scholarly journals A controller for brushless direct current electric motors. Part 2. Software

2020 ◽  
Author(s):  
Zenon Syroka
Keyword(s):  
Motor Control ◽  
Direct Current ◽  
Control Method ◽  
Electric Motors ◽  
Brushless Motors ◽  
Control Module ◽  
Brushless Motor ◽  
Data Bus ◽  
Control Modules ◽  
Universal Controller

A universal controller for brushless direct current (BLDC) motors was designed in the presented article. The system is controlled from the user console where operating parameters are set by the user. Signals are transmitted by cables to microcontrollers which control and monitor electric motors. Microprocessors communicate via a data bus. The controller contains the user console module and the motor control module. The user console module generates commands, and motors are controlled and monitored by the control module. Motor control modules operate independently, and each brushless motor has a dedicated control module. Brushless motors can be controlled in bipolar or unipolar mode. The control method is selected by the operator. The user console and motor controllers communicate via the I²C bus.  

Comparison of the moisture damage of bituminous binder coupled with glass and limestone substrate using pull-off test

2019 ◽  
Vol 46 (3) ◽  
pp. 188-194 ◽  
Author(s):  
Éric Lachance-Tremblay ◽  
Michel Vaillancourt ◽  
Daniel Perraton ◽  
Hervé Di Benedetto
Keyword(s):  
Tensile Testing ◽  
Moisture Damage ◽  
Hot Water ◽  
Test Results ◽  
Substrate Type ◽  
Testing Instrument ◽  
Moisture Susceptibility ◽  
Water Conditioning ◽  
Binder Type ◽  
Bituminous Binders

In this paper, the moisture susceptibility of different bituminous binders with two substrates (glass and limestone) was investigated. To that end, the tensile strength of different combinations of bituminous binder–substrate bond was measured using a pull-off test. This test was adapted from the pneumatic adhesion tensile testing instrument (PATTI) test to improve repeatability. Samples were tested in dry condition and after a 7-day conditioning in hot water bath (60 °C). An analysis of variance (ANOVA) was performed on the test results. Overall, the results show that in dry condition, the pull-off strength is a function of the bituminous binder type rather than of the substrate type. After water conditioning, an increase in the pull-off strength was observed for the bituminous binder without polymers and coupled with glass substrate. This was associated with an increase in binder stiffness. For the limestone substrate, the effect of water conditioning was significant only for one type of binder.

Intelligent Vision Tester Based on Embedded System

2014 ◽  
Vol 971-973 ◽  
pp. 1234-1237
Author(s):  
Xue Feng Yang ◽  
Li Gang Chen
Keyword(s):  
Visual Acuity ◽  
Remote Control ◽  
Embedded System ◽  
Digital Display ◽  
Test Results ◽  
Testing Instrument ◽  
Power Supply Circuit ◽  
Measuring Efficiency ◽  
Stable Performance ◽  
The Embedded System

To solve the problem that artificial visual acuity measuring efficiency is low in hospital and school,and waste of resources,this design introduces an intelligent vision test instrument.The instrument is controlled by Embedded system [1,2], including the power supply circuit, a wireless remote control circuit module,LED display circuit,digital display circuit,a voice circuit etc.Beginning of vision test after audio prompt.This time the LED random light under every line in the standard visual acuity chart.The test selects the direction of wireless remote control rocker of "up", "down", "left", "right"through the "E" the opening direction on standard visual acuity chart.Data is transmitted to the Embedded system,after data processing,to judge whether he is right and wrong,and then displayed.Intelligent vision testing instrument can achieve the anticipated goal,finally complete the design and production, The overall structure of the circuit device is simple, stable performance, the test results meet the requirements.

Simulation on Vibration Isolation System for Vibratory-Drum Test Stand

2013 ◽  
Vol 365-366 ◽  
pp. 351-355 ◽  
Author(s):  
Zhi Feng Zhang ◽  
Hui Gan Xu ◽  
Xian Ning Kong ◽  
Yun Shi Yao
Keyword(s):  
Vibration Isolation ◽  
Performance Test ◽  
Simulation Analysis ◽  
Test Stand ◽  
Test Field ◽  
Test Results ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Rubber Tire ◽  
Vibration Performance

the reliability and vibration performance test of vibratory rollers have been done in the test field to ensure that the vibratory roller meet the quality requirement. At present, the indoor test stand for vibratory roller has not yet been studied at home and abroad. This paper designs the indoor test stand for vibratory roller and makes simulation analysis by the numerical model of vibration-drum and test stand. The vibration isolation system of test stand is determined as a function of the test stand mass (m2), the stiffness of rubber tire (k1) and the stiffness of the vibration isolation block (k2). The test results showed that the vibration drum-test stand model can account for the vibration isolation system.

scholarly journals Metode Modified Weighted Minkowski Untuk Pengembangan Sistem Penalaran Berbasis Kasus

2017 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Edi Faizal
Keyword(s):  
Data Collection ◽  
Knowledge Acquisition ◽  
Error Rate ◽  
Case Based Reasoning ◽  
Test Results ◽  
Research Focus ◽  
Accuracy Rate ◽  
Different Levels ◽  
Case Based ◽  
Representation Of Knowledge

Knowledge acquisition process is not easy, because of the different levels of expertise even though all true. Computer experts had tried other methods to resolve the problem of the acquisition, which is known as case-based reasoning. Representation of knowledge in CBR is a collection of previous case. This research focus is the application of CBR for diagnosing womb diseases. The level of similarity is calculated by using the modified weighted Minkowski. Methods of data collection are interviews, observation and study of literature. The test results show the system can be recognize the womb disease correctly is 94.44% (sensitivity), specitifity rate of 57.14%, PPV of 85.00% and 80.00% NPV. The system have an accuracy rate of 84.00% with an error rate of 16.00%.

scholarly journals Purwarupa Radar sebagai Pendeteksi Benda Diam menggunakan Ultrasonik

2018 ◽  
Vol 6 (3) ◽  
pp. 317
Author(s):  
LUKY RENALDI ◽  
SUGONDO HADIYOSO ◽  
DADAN NUR RAMADAN
Keyword(s):  
Error Rate ◽  
Radar System ◽  
Maximum Distance ◽  
Scanning System ◽  
Test Results ◽  
Rate Measurement ◽  
Servo Motor ◽  
Ultrasonic Sensors ◽  
Detection Of Objects ◽  
Arduino Uno

ABSTRAKDeteksi keberadaan objek secara otomatis pada ruangan diperlukan ketika terdapat keterbatasan dalam melakukan penginderaan. Pemanfaatan sistem radar menjadi saah satu solusi untuk penginderaan objek. Pada paper ini, diimplementasikan prototipe radar menggunakan sensor ultrasonik, mikrokontroller Arduino UNO R3 dan motor servo. Sistem ini dirancang dengan tiga buah sensor ultrasonik dengan motor sebagai penggerak horizontal dan vertikal dalam sistem pemindainya. Sensor yang berjumlah tiga buah, diletakkan pada titik yang berbeda sehingga dapat membaca jarak, sudut dan ketinggian objek dari arah titik tersebut, hasil dari pengukuran objek ditampilkan pada PC melalui aplikasi pemograman GUI. Dari hasil pengujian, radar mampu mendeteksi objek antara 5 cm dari depan radar dengan jarak maksimum 30 cm dan diperoleh tingkat kesalahan pengukuran jarak dan ketinggian sebesar 1 - 2 cm sedangkan untuk sudut 1˚- 3˚.Kata kunci: Deteksi, Radar, Ultrasonik, Jarak, SudutABSTRACTAutomatic detection of objects in the room is required when there are limitations in the sensing. Utilization of radar system becomes one solution for sensing object. In this paper, we implemented a prototype radar using ultrasonic sensor, Arduino UNO R3 microcontroller and servo motor. The system is designed with three ultrasonic sensors with motors as horizontal and vertical drive in the scanning system. Three sensors are placed at different points so that they can read the distance, angle and height of the object from that point, the result of measuring the object displayed on the PC through the GUI programming application. From the test results, the radar is able to detect objects between 5 cm from the front of the radar with a maximum distance of 30 cm and obtained the error rate measurement of distance and altitude of 1 - 2 cm while for the angle of 1˚ - 3˚.Keywords: Detection, Radar, Ultrasonic, Distance, Angle

scholarly journals Application of the DIC Technique to Remote Control of the Hydraulic Load System

2020 ◽  
Vol 12 (21) ◽  
pp. 3667
Author(s):  
Radosław Jasiński ◽  
Krzysztof Stebel ◽  
Jarosław Domin
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Control Method ◽  
Test Stand ◽  
Reinforced Concrete Beams ◽  
Image Correlation ◽  
Optical Measurements ◽  
Electronic Speckle Pattern Interferometry ◽  
Bending Moments ◽  
Test Results

Displacements or deformations of materials or structures are measured with linear variable differential transducers (LVDT), fibre optic sensors, laser sensors, and confocal sensor systems, while strains are measured with electro-resistant tensometers or wire strain gauges. Measurements significantly limited to a point or a small area are the obvious disadvantage of these measurements. Such disadvantages are eliminated by performing measurements with optical techniques, such as digital image correlation (DIC) or electronic speckle pattern interferometry (ESPI). Many devices applied to optical measurements only record test results and do not cooperate with the system that exerts and controls load. This paper describes the procedure for preparing a test stand involving the Digital Image Correlation system ARAMIS 6M for remote-controlled loading. The existing hydraulic power pack (ZWICK-ROELL) was adapted by installing the modern NI cRIO-9022 controller operating under its own software developed within the LABVIEW system. The application of the DIC techniques to directly control load on the real structure is the unquestionable innovation of the described solution. This led to the elimination of errors caused by the test stand susceptibility and more precise relations between load and displacements/strains which have not been possible using the previous solutions. This project is a synergistic and successful combination of civil engineering, computer science, automatic control engineering and electrical engineering that provides a new solution class. The prepared stand was tested using two two-span, statically non-determinable reinforced concrete beams loaded under different conditions (force or displacement). The method of load application was demonstrated to affect the redistribution of bending moments. The conducted tests confirmed the suitability of the applied technique for the remote controlling and recording of test results. Regardless of the load control method (with force or displacement), convergent results were obtained for the redistribution of bending moments. Force-controlled rotation of the beam section over the support was over 50% greater than rotation of the second beam controlled with an increase in the displacement.

Design of Intelligent Explosion-Proof Electromagnetic Starting Reactor Based on PIC16F887

2011 ◽  
Vol 143-144 ◽  
pp. 37-42
Author(s):  
Hong Fei Li ◽  
Na Wang
Keyword(s):  
Asynchronous Motor ◽  
Circuit Complexity ◽  
Test Results ◽  
Squirrel Cage ◽  
Temperature Detection ◽  
Current Voltage ◽  
Starting Process ◽  
High Degree ◽  
Time Type ◽  
Easy Operation

According to high-voltage squirrel-cage AC asynchronous motor using string reactor to reduce voltage starting,there are some shortcomings such as circuit complexity, operation and maintenance trouble, the unfavorable to maintain and update and so on. Design of an intelligent explosion-proof electromagnetic starting reactor based on PIC16F887 microcontroller is proposed, this reactor has time type, current type, time-current starting type which can be set and it has temperature detection protection function in the starting process. After starting completion, it also has the bypass electrical locking function which can real-time monitor the current, voltage and temperature signals to realize intelligent. Using the reactor of controller already has been applied rated voltage 10kV, rated power 1600kW fan commissioning in a coal mine, the test results indicate that this reactor controls current smoothly in the starting process, and has reliable starting performance, easy operation, and high degree of intelligence.

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